interesting rumor heard about Maxtracs and Astro Equipment

2wayguru · Post by **2wayguru** » Wed Apr 14, 2004 12:41 am

I heard a rumor from someone that said that maxtracs when put in a repeater configuration will repeat P25 so if you have astro equipment you can build a maxtrac repeater and use that as a P25 repeater. Right now I am using a UHF Quantar in 440 ham with P25 Astro enabled. But if it is true that you can use maxtracs for P25 I will build a couple and use them as backups if the quantar goes down again or has to go to the depot for some reason. Any info on this will be helpfull... thanks

KG6EAQ · Post by **KG6EAQ** » Wed Apr 14, 2004 12:43 am

When I get my other maxtrac in I'll give it a try. I'll swing down and grab a repeater module from Will and try it out. Would be very interesting though... cheap ASTRO repeater. I like!

Post by **wavetar** » Wed Apr 14, 2004 3:29 am

It was discussed here at length. The Pager Geek is the only person I know of who's been successful & proven it to work. It's not a standard R.I.C.K or 'WILL module' type of set-up.

Todd

clavo · Post by **clavo** » Wed Apr 14, 2004 7:45 pm

You run a P25 ham repeater in the pacific NW? I'm interested in details. Seattle??

-c

motisking · Post by **motisking** » Wed Apr 14, 2004 11:43 pm

Wow! I guess if the repeater "heard" the signal it would repeat it. But the signal at receiving radio would be "noise" and not pass thru? Interesting?!

Hightower · Post by **Hightower** » Mon Apr 19, 2004 9:47 pm

Right after the descriminator, build a simple 4 level FKS decoder ($10), reverse this process and bypass all the audio filtering at the transmitter. Doing this would make the repeater digital only, but hey a cheap way to pass P25 through a homebrew repeater

You might also get results if you feed right out of the descriminator, and feed that past all the mic's audio filtering/DC bias in the transmitter - still some simple op-amp interface would still be needed between the receiver and transmitter.

Your right, normal RICKS or simular will not pass P25 transmissions reliably due to the quad logic digital logic needed for P25. A normal RICK system will pass normal digital 1 and 0, but not 00, 01,10,11 digital quad logic levels required by apco25 and many cellular phones, alpha pagers, etc...

2wayguru · Post by **2wayguru** » Tue Apr 20, 2004 2:14 am

My repeater is in Dundee, about 40 miles SW of Portland....